A sectionalizing method in power system restoration based on Wide Area Measurement Systems

2010 ◽  
Author(s):  
S. A. Nezam-Sarmadi ◽  
A. Salehi Dobakhshari ◽  
S. Azizi ◽  
A. M. Ranjbar ◽  
S. Nouri-Zadeh
Keyword(s):  
Power System ◽  
Area Measurement ◽  
Wide Area ◽  
Measurement Systems ◽  
Power System Restoration ◽  
System Restoration

scholarly journals Frequency Monitoring and Control during Power System Restoration Based on Wide Area Measurement System

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
Saber Nourizadeh ◽  
Vahid Yari ◽  
Ali Mohammad Ranjbar
Keyword(s):  
Power System ◽  
Measurement System ◽  
Frequency Control ◽  
Area Measurement ◽  
Wide Area ◽  
Load Modeling ◽  
Wide Area Measurement System ◽  
Power System Restoration ◽  
System Restoration ◽  
Simulation Results

Frequency control during power system restoration has not been strongly addressed. Operators are often concerned with the offline sizing of load and generation steps, but, nowadays, the introduction of Wide Area Measurement System (WAMS) makes it possible to monitor the stability of power system online. The constraints of WAMS operation result in some changes in power system frequency control. This paper proposes a novel methodology for frequency control and monitoring during the early steps of power system restoration based on WAMS. Detailed load modeling is achieved based on the static load modeling approach. Power generators' modeling is also accomplished utilizing the single machine equivalent of the power system based on PMU measurements. Simulation results of the presented methodology on the 39 bus New England power system clearly show the effectiveness and applicability of the proposed method. The simulation results show that the presented approach has a completely acceptable precision and an outstanding speed with less than 0.05% error. The outstanding speed of the presented approach along with the result precision will result in a great promotion in power system restoration methodologies.

scholarly journals A Three-Stage Procedure for Controlled Islanding to Prevent Wide-Area Blackouts

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3066 ◽  
Author(s):  
Hongbo Shao ◽  
Yubin Mao ◽  
Yongmin Liu ◽  
Wanxun Liu ◽  
Sipei Sun ◽  
...  
Keyword(s):  
Power System ◽  
Dynamic Stability ◽  
Power Flow ◽  
Transient Stability ◽  
Load Shedding ◽  
Area Measurement ◽  
Wide Area ◽  
Measurement Systems ◽  
Controlled Islanding ◽  
Three Stages

Controlled islanding has been proposed as a last resort action to stop blackouts from happening when all standard methods have failed. Successful controlled islanding has to deal with three important issues: when, and where to island, and the evaluation of the dynamic stability in each island after islanding. This paper provides a framework for preventing wide-area blackouts using wide area measurement systems (WAMS), which consists of three stages to execute a successful islanding strategy. Normally, power system collapses and blackouts occur shortly after a cascading outage stage. Using such circumstances, an adapted single machine equivalent (SIME) method was used online to determine transient stability before blackout was imminent, and was then employed to determine when to island based on transient instability. In addition, SIME was adopted to assess the dynamic stability in each island after islanding, and to confirm that the chosen candidate island cutsets were stable before controlled islanding was undertaken. To decide where to island, all possible islanding cutsets were provided using the power flow (PF) tracing method. SIME helped to find the best candidate islanding cutset with the minimal PF imbalance, which is also a transiently stable islanding strategy. In case no possible island cutset existed, corresponding corrective actions such as load shedding and critical generator tripping, were performed in each formed island. Finally, an IEEE 39-bus power system with 10 units was employed to test this framework for a three-stage controlled islanding strategy to prevent imminent blackouts.

A power system build-up restoration method based on wide area measurement systems

2010 ◽  
Vol 21 (1) ◽  
pp. 712-720 ◽  
Author(s):  
S. A. Nezam-Sarmadi ◽  
S. Nourizadeh ◽  
S. Azizi ◽  
R. Rahmat-Samii ◽  
A. M. Ranjbar
Keyword(s):  
Power System ◽  
Area Measurement ◽  
Wide Area ◽  
Measurement Systems ◽  
Restoration Method

Power System Oscillation Modes Identifications: Guidelines for Applying TLS-ESPRIT Method

2013 ◽  
Vol 14 (1) ◽  
pp. 57-66 ◽  
Author(s):  
Gopal R. Gajjar ◽  
Shreevardhan Soman
Keyword(s):  
Power System ◽  
Oscillation Mode ◽  
Area Measurement ◽  
Wide Area ◽  
Mode Identification ◽  
Measurement Systems ◽  
Electromechanical Oscillations ◽  
Direct Observations ◽  
Oscillation Modes ◽  
Selection Of

Abstract Fast measurements of power system quantities available through wide-area measurement systems enables direct observations for power system electromechanical oscillations. But the raw observations data need to be processed to obtain the quantitative measures required to make any inference regarding the power system state. A detailed discussion is presented for the theory behind the general problem of oscillatory mode indentification. This paper presents some results on oscillation mode identification applied to a wide-area frequency measurements system. Guidelines for selection of parametes for obtaining most reliable results from the applied method are provided. Finally, some results on real measurements are presented with our inference on them.

scholarly journals A New Power System Restoration Technique based on WAMS Partitioning

2017 ◽  
Vol 7 (4) ◽  
pp. 1811-1819 ◽  
Author(s):  
N. V. Phanendra Babu ◽  
P. Suresh Babu ◽  
D. V. S. S. Siva Sarma
Keyword(s):  
Power System ◽  
Load Balance ◽  
Area Measurement ◽  
Optimal Placement ◽  
Power Network ◽  
Communication Failure ◽  
Wide Area Measurement System ◽  
Power System Restoration ◽  
Restoration Technique ◽  
System Restoration

An important feature of a Wide-Area Measurement System (WAMS) is the ability to recover data during a communication failure. This paper presents a novel scheme of partitioning a PMU installed power network into a number of WAMS regions in order to make the power system restoration process simpler. This algorithm also proposes the optimal placement of Phasor Data Concentrators (PDCs) in each region to record the data from PMUs. This paper considers the restoration constraints like transformer equivalent bus, generation-load balance and the observability of region for the partitioning of power system. The proposed scheme is demonstrated with an IEEE-30 bus system. It is then applied on IEEE-39, IEEE-118 bus systems and on a Northern Regional Grid of the Indian Power Grid.

Optimal Design of Wide Area Based on Fuzzy Controller and Intelligent Method

2017 ◽  
Vol 27 (03) ◽  
pp. 449-473 ◽  
Author(s):  
Saeed Setayeshi ◽  
Vahid Bairami Rad ◽  
Alireza Noruzi ◽  
Nasser Yousefi
Keyword(s):  
Power Systems ◽  
Power System ◽  
New England ◽  
Fuzzy Controller ◽  
Controller Design ◽  
Area Measurement ◽  
Wide Area ◽  
Nonlinear Controller ◽  
Measurement Systems ◽  
Interconnected Power Systems

Recently, the controller using wide-area measurement systems (WAMS) signals has been proposed by researchers. But, an unavoidable delay before the wide-area signals exists which is received by the controller. Accordingly, a delay-independent robust control problem of large interconnected power systems is presented based on the hybrid fuzzy controller for wide area measurement. A fuzzy controller is a nonlinear controller and it is not so sensitive to system topology, parameter and operating condition changes as the conventional ones. According to wide area power system complexity and variation of the loads and network conditions, FPSS has been considered in this paper. Furthermore, the proposed controller has been improved by chaotic version of shark smell optimization algorithm (CSSO) as an optimization problem. Effectiveness of the proposed method has been applied over the 10 machine 39 bus New England power system. Finally, the effectiveness of the proposed controller design methodology is demonstrated through simulation example. Obtained results demonstrate the superiority of the proposed strategy.

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